Abstract
In this paper a kind of new inorganic antibacterial material: Cu-antibacterial white carbon black containing lanthanum was synthesized. The characterization and antimicrobial effect of the Cu-antibacterial white carbon black containing lanthanum was investigated. Inorganic antibiotic materials comprised the carrier, the antibacterial ion and the additive. In this study, we choosed white carbon black as the carrier, which was compound by a sol-gel method. Copper ion was selected to be the antibacterial ion, and lanthanum nitrate was selected to be the additive. The as-synthesized Cu-La-antibacterial white carbon black was characterized by inductively coupled plasma (ICP), laser particle size analyzer, Fourier transform infra-red spectroscopy (FT-IR) and antibacterial activity test (Escherichia coli as experimental bacterium). Results showed that the amount of antibacterial ions of the Cu-La-antibacterial white carbon black was higher than that for the general Cu-antibacterial white carbon black. Its bacteriostasis rate was about 98% (when the content of Cu 2+ was about 3%), and corresponded to Ag-antibacterial white carbon black (99%). The particle size of Cu-La-antibacterial white carbon black was under 30 μm with a narrow size distribution. Copper ion was bound to white carbon black by ion exchange process. Moreover, this new inorganic antibacterial material showed promising result on the coating surface of metal.
Published Version
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